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Finding the Fourth Proportional to 18,651,648.60, 27,977,472.90 and 5,188,476.60

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Solution

The fourth proportional to 18,651,648.60, 27,977,472.90 and 5,188,476.60 is: 7,782,714.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651,648.60 : 27,977,472.90 = 5,188,476.60 : x
  2. Step 2: Convert to fraction form
    18,651,648.60/27,977,472.90 = 5,188,476.60/x
  3. Step 3: Cross multiply
    18,651,648.60x = 27,977,472.90 × 5,188,476.60
  4. Step 4: Simplify right side
    18,651,648.60x = 145,160,463,468,784.12
  5. Step 5: Solve for x
    x = 145,160,463,468,784.12/18,651,648.60
  6. Step 6: Final answer
    x = 7,782,714.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.